#include <stdio.h>
#include <stdint.h>
int clear_bit(unsigned char reg,int pos) {
// Your code here
reg &= ~(1<<pos);
return reg;
}
int main() {
unsigned char reg, pos;
scanf("%hhu %hhu", ®, &pos);
unsigned char result = clear_bit(reg, pos);
printf("%u", result);
return 0;
}